DOMPurify is a DOM-only, super-fast, uber-tolerant XSS sanitizer for HTML, MathML and SVG. It's written in JavaScript and works in all modern browsers (Safari, Opera (15+), Internet Explorer (10+), Firefox and Chrome - as well as almost anything else using else using Blink or WebKit. It doesn't break on MSIE6 or other legacy browsers. It either uses a fall-back or simply does nothing.

Node.js is an event-based server-side JavaScript engine.